Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
  • C09J133/04—Homopolymers or copolymers of esters
  • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
  • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
  • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
  • C08L2666/04—Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
  • C08L2666/28—Non-macromolecular organic substances
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
  • C08L2666/54—Inorganic substances
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L39/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions of derivatives of such polymers
  • C08L39/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
  • C08L39/06—Homopolymers or copolymers of N-vinyl-pyrrolidones
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J2301/00—Additional features of adhesives in the form of films or foils
  • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
  • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C

Definitions

• the invention relates to a self-adhesive, redispersible adhesive mixture and to a self-adhesive film containing the same for protecting sensitive surfaces, in particular painted metal surfaces or plastic surfaces, in particular plastic profiles, which is particularly important during transport, storage and packaging.
• the protective adhesive tapes hitherto used for this purpose are weakened in their cohesion by the residual organic solvent contained in the lacquer coating, so that when the protective adhesive tape is subsequently removed, some transfer to the coating takes place. The subsequent subsequent cleaning of the lacquer surface contaminated with adhesive is, in turn, only possible with an organic solvent which itself strongly attacks the lacquer.
• the object of the invention was therefore to develop an adhesive mixture which does not have the disadvantages described above, is particularly suitable for producing a self-adhesive film, with the aid of which it is possible to remove sensitive surfaces, specially coated plastic profiles, during transport, storage and Protect packaging effectively.
• the invention further relates to a self-adhesive film for protecting sensitive surfaces, in particular painted metal surfaces or plastic surfaces, especially plastic profiles, which is characterized in that it consists of a conventional carrier, preferably hard polyvinyl chloride, soft polyvinyl chloride, polyester, polyethylene, polypropylene, Laminates with one another or also paper coated therewith, and at least one layer applied thereon consists of the self-adhesive, redispersible adhesive mixture of the composition specified above.
• a conventional carrier preferably hard polyvinyl chloride, soft polyvinyl chloride, polyester, polyethylene, polypropylene, Laminates with one another or also paper coated therewith, and at least one layer applied thereon consists of the self-adhesive, redispersible adhesive mixture of the composition specified above.
• the underside of the carrier preferably has a separating layer (release layer) in order to keep the rolling resistance of the adhesive film in the usual frame.
• It preferably consists of a polymeric octadecyl vinyl ether, applied in the form of a 5 to 10% petrol solution (gasoline fraction with a bp. Of 60-95 ° C. ) of the polymeric octadecyl vinyl ether in a coating amount of 1 to 2 g / m 2 of film.
• the carrier is coated with the self-adhesive, redispersible adhesive mixture according to the invention using a customary application method, for example using a doctor blade, using an air brush, by casting and the like.
• the adhesive film obtained in this way serves as a protective film for sensitive, in particular lacquered surfaces, preferably plastic profiles, as surface protection, in particular during transport, storage and processing or packaging.
• Component (a) of the adhesive mixture according to the invention is an aqueous dispersion with a solids content of 40 to 70% by weight, preferably 50% by weight, based on the weight of the dispersion.
• the C 4 -C '2 alcohol used to prepare the (meth) acrylic acid ester used according to the invention is a straight-chain or branched, saturated or unsaturated, monohydric, primary, secondary or tertiary aliphatic alcohol with 4 to 12 , preferably 4 to 6 carbon atoms. Particularly preferred representatives of this alcohol are n-butanol and n-hexanol.
• the polyvinylpyrrolidone used in component (b) is one with a k value of 50 to 60, corresponding to an average molecular weight of 150,000 to 170,000, in particular 160,000.
• the polyhydric water-soluble alcohol used according to the invention for plasticizing the polyvinylpyrrolidone is preferably one with 2 to 4, in particular with 2 free hydroxyl groups, in particular ethylene glycol, Diethylene glycol or propylene glycol.
• the polyvinylpyrrolidone used in component (b) according to the invention can be partially or completely by a copolymer of a vinyl methyl ether and maleic anhydride with a melting range of 200 to 250 ° C, or a polyvinyl methyl ether with a k value of 50 to 60, corresponding to a molecular weight of 150 000 to 170,000, especially 160,000, to be replaced. In these cases the use of plasticizing alcohol is reduced or unnecessary.
• component (b) of the adhesive mixture according to the invention namely polyvinyl pyrrolidone, vinyl methyl ether / maleic anhydride copolymer and polyvinyl methyl ether, are water-soluble and serve mainly to adjust the surface tack of the adhesive mixture according to the invention. They are also necessary to achieve the desired redispersibility.
• Fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers and ethylene diamine alkoxylate, in particular alkylphenol polyglycol ethers, can preferably be used as anionic or nonionic surfactants. They support the redispersibility of the adhesive mixture according to the invention. The higher the amount of surfactants in the adhesive mixture according to the invention, the better and the faster this process works.
• the customary additives which can be used according to the invention are generally fungicides, thickeners, defoamers, emulsifiers and anti-aging agents as are generally customary in this field, in particular an aliphatic amide (Acticid FC®) as fungicide, a vinylpyrrolidone copolymer ( Collacral VL®) as a thickener, aliphatic hydrocarbons with a hydrophobic silicon compound (Nopco 8034®) as a defoamer, an amine-polyglycol condensate (Nopcowet TB 345®) as an emulsifier and a phenol derivative (Ehatex KA 2299®) as protection against aging.
• Acticid FC® aliphatic amide
• Collacral VL® vinylpyrrolidone copolymer
• aliphatic hydrocarbons with a hydrophobic silicon compound Nopco 8034®
• Nopcowet TB 345® an
• a fatty alcohol polyglycol ether (commercial surfactant, such as Marlipal 124®) should be carried out with slow stirring to avoid unnecessary foam formation.
• a bactericide aliphatic amide compound, such as Acticid FC®
• a defoamer combination of a hydrophobic silicon compound with hydrocarbons and emulsifying, non-ionic components, such as Nopco 8034 - E®
• a thickener copolymer based on vinyl pyrrolidone, such as
• Example 400 parts by weight of a commercially available aqueous carboxyl group-containing dispersion (Lonzacryl XH 500®) consisting of 65 parts by weight of ethylhexyl acrylate, 5 parts by weight of acrylic acid and 10 parts by weight are added to the aqueous solution of the vinyl methyl ether / maleic anhydride copolymer prepared in Example 1. Parts of acrylonitrile with a solids content of 60% are stirred in. After the homogenization, 180 parts by weight of a commercial, aqueous, carboxyl-containing dispersion of vinyl acetate / n-butyl acetate (weight ratio 50:50) (Acronal 500 D®) are added with stirring. This addition increases the film strength and the surface tack of the adhesive film is adjusted. Then proceed as in Example 1.
• a commercially available aqueous carboxyl group-containing dispersion (Lonzacryl XH 500®) consisting of 65 parts by weight of ethyl
• polyvinyl methyl ether with a k value of 50 (commercial product Gantrez M 8) are homogeneously mixed into 400 parts of water (of at most 25 ° C.) in a kneader. The temperature must not exceed + 25 ° C. This solution is introduced into 400 parts by weight of an aqueous polymer dispersion mixture from Example 1 with stirring.
• a surfactant alkylphenol polyglycol ether, such as Marlophen 89®
• a surfactant alkylphenol polyglycol ether, such as Marlophen 89®
• the desired processability of the adhesive mixture can be adjusted as indicated in Example 1 using a thickener.
• Example 2 To 2 00 parts by weight of the vinyl methyl ether / maleic anhydride copolymer solution described in Example 2, 150 parts by weight of the polyvinyl methyl ether solution described in Example 3 are added with stirring. After the homogenization, this mixture of the two preliminary solutions is introduced into 350 parts by weight of the polymer dispersion of Example 1.
• An opaque white-colored, hard PVC foil of a thickness of 50 / um and a width of 850 mm is with the dispersion of Example 3 which has been adjusted by means of an addition of 0.5 parts Collacral VL® to a viscosity of 1800 mpa is coated (measured with a Brookfield spindle 3, rpm 50) using a doctor blade.
• the amount of wet coating applied is 70 g / m 2 at a belt speed of 15 m / min.
• the dispersion in a forced air drying tunnel of a length of 20 m is dried at 70 0 C.
• the back is then coated with a release layer based on polyoctadecyl vinyl ether using a roller application. After winding, the roll is cut to the desired width and rolled over.
• a window profile made of rigid PVC is coated with an acrylic-based solvent-based varnish by indirect gravure printing on the outside.
• the brown pigmented varnish has after drying at 75 ° C still a residual solvent content of 6.5%.
• the adhesive film according to Example 5 is applied with the help of a roller application system to the warm paint layer.
• the profile protected in this way is subjected to various tests. With artificial weathering in the Suntest®, there was no visible degradation of the adhesive or transfer to the paint layer even after 500 hours. In contrast, with conventional protective films, degradation and transfer of the adhesive were found after about 250 hours.

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Cited By (4)

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Citations (4)

• 1984
  • 1984-02-28 DE DE19843407279 patent/DE3407279A1/de not_active Withdrawn
• 1985
  • 1985-02-23 ES ES540667A patent/ES8606454A1/es not_active Expired
  • 1985-02-25 PT PT80005A patent/PT80005B/pt unknown
  • 1985-02-27 EP EP85102173A patent/EP0155557A1/fr not_active Ceased

Patent Citations (4)

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